[FEATURE] Ability to "edit" a vocab word's reading

[saxoncameron]

Related: #143

The parser is imperfect, so there will be mistakes. If users could edit these mistakes from within the "Vocab" section, that would be an ideal solution. This would then reflect on the front of the card too, of course, in the example words.

[saxoncameron]

I envision this as an on-hover icon UI, perhaps as one of three actions, including:

• editing ([FEATURE] Ability to "edit" a vocab word's reading #160)
• starring, to "pin" an example word to the card front ([FEATURE] Starring system for linked vocab, stories #114)
• deleting/ignoring ([FEATURE] Add the ability to delete/ignore a word #158)